Bubble domain circuit organization

Abstract

An on-chip bubble domain circuit organization utilizing a multi-chip concept is provided. One or more storage registers are separately connected to each of a plurality of propagation channels whereby data in the form of magnetic bubble domains (bubbles) may be transferred into and out of the storage registers. Each of the propagation channels includes a generator for producing the initial bubbles which are supplied to a multiple output replicator via an input propagation path. The initial bubbles are replicated into any desired number of new bubbles by a multiple output replicator. The input propagation paths for the several channels have different lengths of propagation times between the generator and the replicator. Input decoders are utilized to determine to which storage register the bubbles from the replicators will be directed along the propagation channel. Those bubbles not selected are, typically, annihilated. Output decoders utilizing essentially the same decoding scheme as the input decoders, selectively received bubbles from the storage registers. A transfer and replicate switch is utilized between the storage register and output decoders to selectively transfer bubbles to the output decoders. The output decoders may collapse all of the bubbles from certain storage registers so that only the information from the selected storage register reaches the detector. Moreover, the output decoders have different path lengths to the detectors, as a function of the input propagation path, so that each channel has the same propagation time from generator to detector. The detectors in turn produce the chip output signals. External control electronics are utilized to control the selective operation of the various devices utilized in the propagation channels.